[FEATURE] Interupt/real-time/hint messages with Claude Code Chat

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I love the Claude Code Chat UI. One feature though I REALLY miss is the ability to "interupt" or give real-time "hints" to the agent in cases where there is something it is missing or I'd like to suggest a fix or something to remember when it is done. This has been EXTREMELY useful on the CLI and would be a neccesity for me to actively use the Chat UI.

Proposed Solution

Enable real time chat interruptions/suggestions.